|本期目录/Table of Contents|

[1]方少之,贾东,苑京文.下扬子地区志留系高家边组沉积时代及页岩气潜力[J].地球科学与环境学报,2018,40(01):24-35.
　FANG Shao-zhi,JIA Dong,YUAN Jing-wen.Sedimentary Age and Potential of Shale Gas from Silurian Gaojiabian Formation in Lower Yangtze Region[J].Journal of Earth Sciences and Environment,2018,40(01):24-35.
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下扬子地区志留系高家边组沉积时代及页岩气潜力(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第40卷
期数:
2018年第01期
页码:
24-35
栏目:
基础地质与矿产地质
出版日期:
2018-01-15

文章信息/Info

Title:
Sedimentary Age and Potential of Shale Gas from Silurian Gaojiabian Formation in Lower Yangtze Region
文章编号:
1672-6561(2018)01-0024-12
作者:
方少之; 贾东; 苑京文
南京大学 地球科学与工程学院，江苏 南京 210023
Author(s):
FANG Shao-zhi;  JIA Dong;  YUAN Jing-wen
School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, Jiangsu, China
关键词:
沉积时代; 高家边组; 锆石UPb年龄; 志留系; 凝灰岩; 页岩气; 笔石带; 下扬子地区
Keywords:
sedimentary age;  Gaojiabian Formation;  zircon U-Pb age;  Silurian;  tuff;  shale gas;  graptolite zone;  Lower Yangtze region
分类号:
P618.13;TE122
DOI:
-
文献标志码:
A
摘要:
上扬子地区龙马溪组的页岩气勘探与开发已取得重大突破，而下扬子地区高家边组与龙马溪组属于同一时期的沉积地层，其页岩气开发潜力尚待挖掘。选择江苏仑山地区高家边组凝灰岩夹层中的锆石进行LA-ICP-MS U-Pb定年，探讨高家边组沉积时代、古环境、页岩气潜力，并与上扬子地区龙马溪组进行对比分析。结果表明：下扬子地区高家边组形成年龄为(442.8±2.6)Ma，属于早志留世，这一年龄使得下扬子地区高家边组沉积时代第一次得到准确可靠的年代学约束；高家边组沉积时的水体为还原环境；高家边组总有机碳(2%~4%)中等偏上，生烃能力较强，镜质体反射率为1.5%~2.3%，热演化程度为高成熟晚期；下扬子地区高家边组与上扬子地区龙马溪组在总有机碳、镜质体反射率、岩性组合、笔石类型以及沉积环境等方面均具有高度相似性，指示其具备页岩气勘探开发潜力。
Abstract:
The exploration and development of shale gas from Longmaxi Formation in Upper Yangtze region make a great breakthrough. The sedimentary stratum from Gaojiabian Formation in Lower Yangtze region belongs to the same period as that of Longmaxi Formation in Upper Yangtze region, but the potential of shale gas is unknown. The LA-ICP-MS zircon U-Pb dating of tuff interlayer from Gaojiabian Formation in Lunshan area of Jiangsu was measured; the sedimentary age, palaeoenvironment, and potential of shale gas from Gaojiabian Formation were discussed; meanwhile, the comparison between Gaojiabian Formation in Lower Yangtze region and Longmaxi Formation in Upper Yangtze region was analyzed. The results show that Gaojiabian Formation is emplaced in (442.8±2.6)Ma, belonging to Early Silurian, and it is the first time to acquire an accurate and reliable chronology constraint of Gaojiabian Formation in Lower Yangtze region; the sediment water of Gaojiabian Formation is reducing environment; the total organic carbon (2%-4%) of Gaojiabian Formation is moderately high with strong capacity of hydrocarbon generation, and the vitrinite reflectance is 1.5%-2.3%, reflecting the thermal evolution degree is highmature late stage; the total organic carbon, vitrinite reflectance, lithological association, types of graptolites and sedimentary environment of Gaojiabian Formation in Lower Yangtze region are highly similar to those of Longmaxi Formation in Upper Yangtze region, suggesting that Gaojiabian Formation has good potential of shale gas.

参考文献/References:

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相似文献/References:

[1]张艳斌,李秋立.前寒武纪碎屑岩沉积作用时间的限定：沉积自生磷钇矿定年[J].地球科学与环境学报,2017,39(06):711.
　ZHANG Yan-bin,LI Qiu-li.Determining the Depositional Age of Precambrian Clastic Sedimentary Rocks: Diagenetic Authigenic Xenotime Dating[J].Journal of Earth Sciences and Environment,2017,39(01):711.

备注/Memo

备注/Memo:
收稿日期:2017-11-28;修回日期:2017-12-23
基金项目:国家自然科学基金项目(41230208)
作者简介:方少之(1993-),男,江苏连云港人,理学硕士研究生,E-mail:fangshaozhi0825@163.com。
通讯作者:贾  东(1960-),男,陕西西安人,教授,博士研究生导师,理学博士,E-mail:djia@nju.edu.cn。
更新日期/Last Update: 2018-03-08